Same halogen atom (-X), increased in the size of the alkyl chain
CH3Cl CH3CH2Cl CH3(CH2)2Cl CH3(CH2)3Cl
What is the effect on the boiling point and the density?
Boiling point increases, density increases
Boiling point increases, density decreases
Boiling point decreases, density decreases
Boiling point decreases, density increases